Picture frame



FIG. 1 is a front elevational view of a picture frame showing our new design;

FIG. 2 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 3 is a top plan view thereof, the bottom plan view being a mirror image;

FIG. 4 is a horizontal sectional view thereof as seen from the plane 4-4 in FIG. 1; and,

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a picture frame, as shown and described. 